/Engine/Source/Runtime/UMG/Public/Components/TreeView.h
TreeViews only. Gets the items to consider children of the given item when generating child entries.
virtual void OnGetChildrenInternal ( [UObject](API\Runtime\CoreUObject\UObject\UObject) * Item, [TArray](API\Runtime\Core\Containers\TArray)< [UObject](API\Runtime\CoreUObject\UObject\UObject) * > & OutChildren ) const